Suspended refractory brick



Oct. 25, 1966 D. c. BURKLO 3,280,772

SUSPENDED REFRACTORY BRICK Filed Oct. 5, 1964 I N VE NTOR.

DONALD C. BURKLO ATTORNEK' United States Patent 3,280,772 SUSPENDED REFRACTORY BRICK Donald C. Burklo, Columbiana, Ohio, assignor to Kaiser Aluminum & Chemical Corporation, Oakland, Calif., a corporation of Delaware Filed Oct. 5, 1964, Ser. No. 401,563 12 Claims. (CL 110-99) This invention relates to refractories and particularly to refractory shapes adapted to be suspended in a furnace lining.

While it is known to make unfired or chemically bonded refractories with co-molded hangers (i.e., hang ers about which the refractory shape is molded at the time it is formed), and while it is also known to support fired refractory shapes with hanger-s of various sorts, still it is a problem in the industry to obtain fired refractory shapes with a firmly attached hanger which can be readily and economically attached to the fired shape and which will be so attached that the shape cannot accidentally drop off the hanger during construction or use of the furnace or other high temperature structure in which the shape is used.

According to the present invention, there is now provided a refractory shape meeting the above requirements, as will be more fully explained in the following specification, taken together with the annexed drawing, in which:

FIG. 1 is a perspective view of the suspendable refractory unit according to this invention;

FIG. 2 is an enlarged perspective view of the hanger used in the refractory unit of this invention;

FIG. 2A is a partial view, similar to that of FIG. 2, i

of another embodiment of the hanger; and

FIG. 3 is a longitudinal section through a refractory unit according to this invention taken along the line -33 of FIG. 1.

A refractory unit according to this invention comprises a refractory shape 11, shown in the drawings as a rectangular brick, although it will be understood that other shapes, for example wedge or tapered shapes or shapes with arcu-ate edges, can be used. Refractory shape 11 has an end face 12 intended to be disposed at the cold side of the roof or other structure in which the unit is used, and a longitudinal or side face 13 adjacent thereto. In side face 13, and adjacent or near to but spaced from end face 12, is a recess 14. A hanger 15 is provided which has adjacent or near one end 22 an opening 16 for receiving a supporting means such as a hook or bolt (not shown). Hanger 15 also has an opening or aperture 19 and a flange 17 extending from and disposed at right angles to the hanger. When hanger 15 is placed on the refractory shape 11 flange 17 is disposed within recess 14 of refractory shape 11 and opening 19 registers with recess 14. Preferably flange 17 is so disposed that it lies adjacent to or abuts against the upper surface 18 (that is, the surface closest to end face 12 of refractory shape 11) of recess 14, to assist in supporting the refractory shape. Overlying hanger 15 when it is in position on the refractory shape 11 is a metal casing 21 attached to the refractory shape 11. The portion of casing 21 overlying opening 19 in hanger 15 and recess 14 in refractory shape 11 is depressed through opening 19 and into recess 14, preferably by piercing, the pierced edges 27 being turned or depressed into recess 14 through opening 19.

In the preferred form of the invention shown in the 3,280,772 Patented Oct. 25, 1966 pendicular to the end face 12 and overlying the hanger 15, particularly its opening 19, and recess 14 in refractory shape 11. The two U-shaped metal cases 21a and 21b are attached to refractory shape 11 by means of dimples 24 forced into shallow depressions 25 in refractory shape 11, as is shown in Reissue Patent No. 25,615. Although the dimpling method of attachment is preferred, it will be understood that other means, for example welding or gluing known in the art can be used. It will be understood that the metal casing covers at least the portion of side face 13 of refractory shape 11 inthe region of hanger 15, but can cover more than one side face. When the casing 21 covers only the side face 13, or a portion thereof, it can be attached to the refractory shape 11 by gluing, for example.

In the preferred embodiment of this invention, as is illustrated in the drawing, hanger 15 also has a depression-receiving portion, shown in the drawing as a hole 20. This depression-receiving portion is preferably located in a portion of the hanger more remote from the portion of the hanger extending beyond the end face 12 of refractory shape 11 than the opening 19. The depression-receiving portion of the hanger 15, which can be a shallow depression or dimple in the hanger 15 instead of the hole 20 shown, overlies a shallow depression 25 in refractory shape 11. The portion of the metal casing 21 overlying the depression-receiving portion of hanger 15, is depressed or dimpled into the depression receiving portion of the hanger 15, the dimple 24' being illustrated. The forcing of the dimple 24 through the hole 20 and into the shallow depression 25' has the effect of more securely anchoring the hanger 15 under the metal casing 21 and generally makes for a more rigid attachment of the hanger 15. While the use of a depression-receiving portion in the hanger 15 is particularly advantageous when the casing 21 takes the form of two abutting U-shaped pieces 21a and 21b attached to the refractory shape 11 by dimpling, it will be understood that the depression-receiving portion can be used when other types of casing and other means of attachment are used.

Further strengthening of the attachment of the hanger can be had by welding casing 21 to hanger 15 in the region of depression 24'. Also, the edges 27 can be welded to hanger 15, if desired.

While the flange 17 is shown as a struck-out portion of the plate from which hanger 15 is made, the flange being disposed perpendicular to hanger 15, it will be understood that flange 17 can take the form of one or, as illustrated in FIG. 2A, two struck out portions 17' and 17 disposed perpendicular to both the end face 12 and to the plane of the hanger. It will be clear that other ways of making flanges 17 can be used.

In a preferred embodiment, hanger 15 is shown in the drawings in a groove 28 in the refractory shape 11. This construction is preferred because it makes it easier to assemble the unit, particularly when metal casing 21 takes the form of two U-shaped pieces 21a and 21b, and because it results in a unit with more uniform dimensions throughout. It will be understood that, alternatively, hanger 15 can rest on and extend outwardly from side face 13.

Refractory shape 11 can be made from any refractory material. The structure of this invention is particularly advantageous when the refractory shape is made of basic or non-acid refractory material, particularly oxide refractories such as, for example, deadburned magnesia, for example in the form of periolase, or mixtures of such magnesia with chrome ore. While the structure of this invention is particularly useful with a refractory shape which has been fired before the hanger and easing are attached, it will be understood that the structure can be used with an unfired refractory shape.

The hanger and metal casing can be made of any suitable metal, as is Well known in the art. For example, the

casing can be of plain carbon steel, although stainless 'face along said side face and having a flange projecting substantially perpendicular thereto and having an opening registering with said recess, said hanger flange projecting into said recess and said hanger opening overlying said recess, a portion of said hanger projecting beyond the end face of the refractory shape; and a metal casing attached to said refractory shape and overlying said side face and said hanger, the portion of said casing over the opening in the hanger and the recess in the refractory shape being depressed through said opening into said recess.

2. A refractory until comprising? a refractory shape having an end face and a side face adjacent thereto, said side face having a recess therein near to but spaced from said end face; a metal hanger having a flange projecting substantially perpendicular thereto and having an opening adjacent to said flange and registering with said recess, said flange being disposed within said recess, a portion of said hanger projecting beyond the end face of 'said refractory shape; and a metal casing attached to said refractory shape and overlying said side face and said "hanger, the portion of said casing over the opening in the hanger and the recess in the refractory shape being de- I pressed through said opening into said recess to aflix said hanger to said shape, said metal casing being in the form of opposed metal channel-shaped plates, the opposed edges of the arms of said plates being disposed substantially perpendicular to the end face of the refractory.

3. A refractory unit according to claim 2 wherein said refractory shape is a fired refractory article.

4. A refractory unit according to claim 3 wherein portions of the opposed edges of the plates are depressed into shallow depressions in the refractory shape.

5. A refractory unit comprising: a refractory shape having an end face and a side face adjacent thereto, said side face having a recess therein near to but spaced from said end face; a metal hanger having a flange projecting substantially perpendicular thereto and having an opening adjacent to said flange and registering with said 'recess, said flange extending into said recess and a portion of said hanger projecting beyond the end face of 'the refractory shape, said hanger also having a depression-receiving portion, said depression-receiving portion overlying a shallow depression in the side face of the refractory shape; and a metal casing attached to said refractory shape and overlying said side face and said hanger, the portion of said casing over the opening in the hanger and the recess in the refractory shape being depressed through said opening into said recess, and the portion of said metal casing overlying the depressionreceiving portion of said hanger being depressed into the depression-receiving portion.

6. A refractory unit comprising: a refractory shape having an end face and a side face adjacent thereto, said 'side face having a recess therein near to but spaced from said end face; a metal hanger having a flange projecting substantially perpendicular thereto and having an opening adjacent to said flange and registering with said recess, said flange extending into said recess and a portion of said hanger projecting beyond the end face of the refractory shape, said hanger also having a depression-receiving portion, said depression-receiving portion overlying a shallow depression in the side face of the refractory shape; and a metal casing attached to said refractory shape and overlying said side face and said hanger, the portion of said casing over the opening in the hanger and the recess in the refractory shape being depressed through said opening into said recess, the portion of said metal casing overlying the depressionreceiving portion of said hanger being depressed into the depression-receiving portion, said metal casing being in the form of opposed channel-shaped metal plates, the opposed edges of the arms of said plates being disposed substantially perpendicular to the end face of the refractory.

7. A refractory unit according to claim 6 wherein said refractory shape is a fired refractory article.

8. A refractory unit according to claim 7 wherein portions'of the opposed edges of the metal plates are depressed into shallow depressions in the refractory shape.

9. A refractory unit adapted to be supported from an overhead structure comprising: a refractory shape said flange extending into said recess and a portion of said hanger projecting beyond the end face of the refractory shape, said projecting portion having a supportreceiving opening therein, said hanger having a second aperture therein more remote from the projecting portion of the hanger thanthe aperture adjacent the flange, said second aperture registering with a shallow depression in the side face of the refractory shape; and a metal casing attached to said refractory shape and overlying said side face and said hanger, the portion of said casing over said first mentioned aperture being depressed through said aperture into said recess in the refractory shape, the portion of said metal casing overlying said second aperture being depressed into the said second aperture and said shallow depression in the refractory shape, said metal casing being in the form of opposed metal channel-shaped plates, the opposed edges of the arms of said plates being disposed substantially perpendicular to the end face of the refractory.

10. A refractory unit according to claim 9 wherein said hanger is formed from a metal plate and said flange is a struck-out portion of said plate, said flange being disposed parallel to said end face of the refractory shape.

11. A refractory unit according to claim 9 wherein said hanger isformed from a metal plate and said flange is a struck-out portion of said plate, said flange being dlilsposed perpendicular to said end face of the refractory s ape.

12. A refractory unit adapted to be supported from an overhead structure comprising: a fired refractory shape having an end face and a side face adjacent thereto, said side face having a recess therein near to but spaced from said end face; a metal hanger having a flange projecting substantially perpendicular thereto and having an aperture adjacent to said flange and registering with said recess, said flange extending into said recess, and a portion of said hanger projecting beyond the end face of the refractory shape, said projecting portion having a supportreceiving opening therein, said hanger having a second aperture therein more remote from the projecting portion of the hanger than the aperture adjacent the flange, said second aperture registering with a shallow depression in the side face of the refractory shape; said hanger being disposed in a groove in the side face of the refractory; and a metal casing attached to said refractory shape and overlying said side face and said hanger, the portion edges being depressed into said opening in the hanger 0 and the recess in said shape and other portions of said opposed edges being depressed into shallow depressions in the refractory shape.

References Cited by the Examiner UNITED STATES PATENTS 2,885,976 5/1959 McGill et al. 11099 2,991,736 7/1961 Kivala et al. 11099 3,029,755 4/1962 Crichton 11099 3,083,453 4/1963 Reynolds et a1 11099 3,140,676 7/1964 Duncan 11099 FOREIGN PATENTS 230,263 11/ 1963 Austria.

FREDERICK L. MATTESON, JR., Primary Examiner.

R. A. DUA, Assistant Examiner. 

1. A REFRACTORY UNIT COMPRISING: A REFRACTORY SHAPE HAVING AN END FACE AND A SIDE FACE ADJACENT THERETO, SAID SIDE FACE HAVING A RECESS THEREIN NEAR TO BE SPACED FROM SAID END FACE; A METAL HANGER EXTENDING FROM SAID END FACE ALONG SAID SIDE FACE AND HAVING A FLANGE PROJECTING SUBSTANTIALLY PERPENDICULAR THERETO AND HAVING AN OPENING REGISTERING WITH SAID RECESS, SAID HANGER FLANGE PROJECTING INTO SAID RECESS AND SAID HANGER OPENING OVERLYING SAID RECESS, A PORTION OF SAID HANGER PROJECTING BEYOND THE END FACE OF THE REFRACTORY SHAPE; AND A METAL CASING ATTACHED TO SAID REFRACTORY SHAPE AND OVERLYING SAID SIDE FACE AND SAID HANGER, THE PORTION OF SAID CASING OVER THE OPENING IN THE HANGER AND THE RECESS IN THE REFRACTORY SHAPE BEING DEPRESSED THROUGH SAID OPENING INTO SAID RECESS. 